/**
 * Descriptors.c
 *
 * HSI-88 Fast S88 PC Interface 
 * 
 * This software emulates the HSI-88 from Littfinski. It has three S88 busses that it activly scans only reporting the changed
 * signals to the PC.
 *
 * Author:   Elze Kool <efrkool@live.nl>
 * Date:     27-nov-2009
 * Software: AVR-GCC
 * Target:   AT90USB162 @ 8Mhz on the Olimex AVR-USB-162 development board
 *
 * Based on the LUFA USB Library and Serial CDC Example:
 * Parts Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 *
 */

/** \file
 *
 *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special 
 *  computer-readable structures which the host requests upon device enumeration, to determine
 *  the device's capabilities and functions.  
 */

#include "Descriptors.h"

/** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
 *  device characteristics, including the supported USB version, control endpoint size and the
 *  number of device configurations. The descriptor is read out by the USB host when the enumeration
 *  process begins.
 */
USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
{
	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
		
	.USBSpecification       = VERSION_BCD(01.10),
	.Class                  = 0x02,
	.SubClass               = 0x00,
	.Protocol               = 0x00,
				
	.Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
		
	.VendorID               = 0x03EB, // Vendor ID isn't real
	.ProductID              = 0x5D6D, // Product ID isn't real (Maybe I can buy one from vendor)
	.ReleaseNumber          = 0x0001,
		
	.ManufacturerStrIndex   = 0x01, // ManufacturerString Index
	.ProductStrIndex        = 0x02, // ProductString Index
	.SerialNumStrIndex      = 0x03, // SerialString Index
		
	.NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
};

/** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
 *  of the device in one of its supported configurations, including information about any device interfaces
 *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
 *  a configuration so that the host may correctly communicate with the USB device.
 */
USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
{
	.Config = 
		{
			.Header                 = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},

			.TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
			.TotalInterfaces        = 2,
				
			.ConfigurationNumber    = 1,
			.ConfigurationStrIndex  = NO_DESCRIPTOR,
				
			.ConfigAttributes       = (USB_CONFIG_ATTR_BUSPOWERED | USB_CONFIG_ATTR_SELFPOWERED),
			
			.MaxPowerConsumption    = USB_CONFIG_POWER_MA(200)
		},
		
	.CCI_Interface = 
		{
			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},

			.InterfaceNumber        = 0,
			.AlternateSetting       = 0,
			
			.TotalEndpoints         = 1,
				
			.Class                  = 0x02,
			.SubClass               = 0x02,
			.Protocol               = 0x01,
				
			.InterfaceStrIndex      = NO_DESCRIPTOR
		},

	.CDC_Functional_IntHeader = 
		{
			.Header                 = {.Size = sizeof(CDC_FUNCTIONAL_DESCRIPTOR(2)), .Type = 0x24},
			.SubType                = 0x00,
			
			.Data                   = {0x01, 0x10}
		},

	.CDC_Functional_CallManagement = 
		{
			.Header                 = {.Size = sizeof(CDC_FUNCTIONAL_DESCRIPTOR(2)), .Type = 0x24},
			.SubType                = 0x01,
			
			.Data                   = {0x03, 0x01}
		},

	.CDC_Functional_AbstractControlManagement = 
		{
			.Header                 = {.Size = sizeof(CDC_FUNCTIONAL_DESCRIPTOR(1)), .Type = 0x24},
			.SubType                = 0x02,
			
			.Data                   = {0x06}
		},
		
	.CDC_Functional_Union= 
		{
			.Header                 = {.Size = sizeof(CDC_FUNCTIONAL_DESCRIPTOR(2)), .Type = 0x24},
			.SubType                = 0x06,
			
			.Data                   = {0x00, 0x01}
		},

	.ManagementEndpoint = 
		{
			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
										 
			.EndpointAddress        = (ENDPOINT_DESCRIPTOR_DIR_IN | CDC_NOTIFICATION_EPNUM),
			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
			.EndpointSize           = CDC_NOTIFICATION_EPSIZE,
			.PollingIntervalMS      = 0xFF
		},

	.DCI_Interface = 
		{
			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},

			.InterfaceNumber        = 1,
			.AlternateSetting       = 0,
			
			.TotalEndpoints         = 2,
				
			.Class                  = 0x0A,
			.SubClass               = 0x00,
			.Protocol               = 0x00,
				
			.InterfaceStrIndex      = NO_DESCRIPTOR
		},

	.DataOutEndpoint = 
		{
			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
										 
			.EndpointAddress        = (ENDPOINT_DESCRIPTOR_DIR_OUT | CDC_RX_EPNUM),
			.Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
			.EndpointSize           = CDC_TXRX_EPSIZE,
			.PollingIntervalMS      = 0x00
		},
		
	.DataInEndpoint = 
		{
			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
										 
			.EndpointAddress        = (ENDPOINT_DESCRIPTOR_DIR_IN | CDC_TX_EPNUM),
			.Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
			.EndpointSize           = CDC_TXRX_EPSIZE,
			.PollingIntervalMS      = 0x00
		}
};

/** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
 *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
 *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
 */
USB_Descriptor_String_t PROGMEM LanguageString =
{
	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
		
	.UnicodeString          = {LANGUAGE_ID_ENG}
};

/** 
 * Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
 * form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 * Descriptor.
 */
USB_Descriptor_String_t PROGMEM ManufacturerString =
{
 .Header                 = {.Size = USB_STRING_LEN(9), .Type = DTYPE_String},
 .UnicodeString          = L"Elze Kool"
};

/** 
 * Product descriptor string. This is a Unicode string containing the product's details in human readable form,
 * and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 * Descriptor.
 */
USB_Descriptor_String_t PROGMEM ProductString =
{
	.Header                 = {.Size = USB_STRING_LEN(16), .Type = DTYPE_String},
	.UnicodeString          = L"HSI-88 Interface"
};

/** 
 * Product Serial Number
 **/
USB_Descriptor_String_t PROGMEM SerialString =
{
	.Header                 = {.Size = USB_STRING_LEN(8), .Type = DTYPE_String},
	.UnicodeString          = L"00000001"
};



/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
 *  documentation) by the application code so that the address and size of a requested descriptor can be given
 *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
 *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
 *  USB host.
 */
uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress)
{
	const uint8_t  DescriptorType   = (wValue >> 8);
	const uint8_t  DescriptorNumber = (wValue & 0xFF);

	void*    Address = NULL;
	uint16_t Size    = NO_DESCRIPTOR;

	switch (DescriptorType)
	{
		case DTYPE_Device: 
			Address = (void*)&DeviceDescriptor;
			Size    = sizeof(USB_Descriptor_Device_t);
			break;
		case DTYPE_Configuration: 
			Address = (void*)&ConfigurationDescriptor;
			Size    = sizeof(USB_Descriptor_Configuration_t);
			break;
		case DTYPE_String: 
			switch (DescriptorNumber)
			{
				case 0x00: 
					Address = (void*)&LanguageString;
					Size    = pgm_read_byte(&LanguageString.Header.Size);
					break;
					
				case 0x01: 
					Address = (void*)&ManufacturerString;
					Size    = pgm_read_byte(&ManufacturerString.Header.Size);
					break;
					
				case 0x02: 
					Address = (void*)&ProductString;
					Size    = pgm_read_byte(&ProductString.Header.Size);
					break;
					
				case 0x03: 
					Address = (void*)&SerialString;
					Size    = pgm_read_byte(&SerialString.Header.Size);
					break;

			}
			
			break;
	}
	
	*DescriptorAddress = Address;
	return Size;
}
